> 数学 >
3(n-1)²-2(n-1)+1怎么化简
人气:398 ℃ 时间:2020-02-06 06:16:30
解答
3(n-1)²-2(n-1)+1
=3(n²-2n+1)-2(n-1)+1
=3n²-6n+3-2n+2+1
=3n²-8n+63(n²-2n+1)看不懂(n-1)²=n²-2n+1
推荐
猜你喜欢
© 2024 79432.Com All Rights Reserved.
电脑版|手机版